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MRIND Models

Question asked by BBROUGHTON on Jun 17, 2003
Latest reply on Jun 20, 2003 by wrivas

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Has anybody had any involved experience with the MRIND rectangular inductor models within ADS?

I am trying to figure out which model to believe --
MRIND original model (ADS2001 and previous + ADS2002C)
MRINDO updated model (ADS2002 and ADS2003A

The effective inductance of these two models varies widely, and I am hoping for some feedback about which one is closer to measured data. Unfortunately, I don't have enough data yet to draw any conclusions on my own.

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wrivas Jun 20, 2003 1:26 AM
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This situation started in a most bizarre and even unfortunate way. We got several complaints about the MRIND model (based on model developed by W. Getsinger) in ADS2001 not matching the measurement results for some customers. It was decided then to "improve" the model based on modifications by C. Holmes to the original model in ADS2002. This last change made some customers happy but affected other customers. Finally in ADS2003A we decided to make the MRIND equal to what we had in ADS2001 and the "newer" model is now MRINDO (accessed by type it in the history field). This change of a model in the background was a one time change and will never happen again. Also going forward we will have available MRIND and MRINDO as they are in ADS2003A.

One could characterize the models over a range of values and different substrates, and compare them with Momentum results or measurements, and hence, find a guideline on which model to use in which circumstances. If you want to have a more robust model you may want to use the Advanced Model Composer.
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